That looks like it could be Hikvision firmware.
If so, I think that very old version will have the 'Hikvision backdoor' vulnerability, in which case the configuration file can be pulled and the password extracted.

You can check it out by using this URL, from a PC that is on the same IP address range as the camera.

In the browser replace the IP address with that of the camera:
http://<camera_IP_address>/System/configurationFile?auth=YWRtaW46MTEK
If it pulls out a configuration file, zip it up and attach here, and I'll decrypt and decode it for you and extract the lost password.

Your camera might have an OEM code set in the hardware descriptor block, which the stock firmware may object to.
If so - it will just reject the attempted update.

A word of caution though -
Do any updates through the major versions instead of one big jump.
And the hope would be that your camera isn't a China region device that would be bricked by a firmware update.